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When physics teacher Johnathan Derry is unwittingly given some computer tapes containing a bookie-breaking system, his abilities come in handy against the thug who comes looking for them. Fourteen years later, Jonathan's brother William is about to fall victim to the same thug.
Softcover. English. Pan Books. 1983. ISBN: 9780330269186. 416 pp. Fair. Book No: 58951
